gtk2_ardour/add_video_dialog.cc

   1 /*
   2     Copyright (C) 2010-2013 Paul Davis
   3     Author: Robin Gareus <robin@gareus.org>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20 #include <cstdio>
  21 #include <cmath>
  22
  23 #include <sigc++/bind.h>
  24 #include <curl/curl.h>
  25
  26 #include "pbd/error.h"
  27 #include "pbd/convert.h"
  28 #include "gtkmm2ext/utils.h"
  29 #include "gtkmm2ext/rgb_macros.h"
  30 #include "ardour/session_directory.h"
  31 #include "ardour/profile.h"
  32 #include "ardour/template_utils.h"
  33 #include "ardour/session.h"
  34 #include "ardour_ui.h"
  35
  36 #include "add_video_dialog.h"
  37 #include "ardour_http.h"
  38 #include "utils_videotl.h"
  39 #include "pbd/i18n.h"
  40
  41 using namespace Gtk;
  42 using namespace std;
  43 using namespace PBD;
  44 using namespace ARDOUR;
  45 using namespace VideoUtils;
  46
  47 #define PREVIEW_WIDTH (240)
  48 #define PREVIEW_HEIGHT (180)
  49
  50 #ifndef MIN
  51 #define MIN(a,b) ( (a) < (b) ? (a) : (b) )
  52 #endif
  53
  54 AddVideoDialog::AddVideoDialog (Session* s)
  55         : ArdourDialog (_("Set Video Track"))
  56         , seek_slider (0,1000,1)
  57         , preview_path ("")
  58         , pi_tcin ("-", Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false)
  59         , pi_tcout ("-", Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false)
  60         , pi_aspect ("-", Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false)
  61         , pi_fps ("-", Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false)
  62         , chooser (FILE_CHOOSER_ACTION_OPEN)
  63         , xjadeo_checkbox (_("Open Video Monitor Window"))
  64         , set_session_fps_checkbox (_("Adjust Session Framerate to Match Video Framerate"))
  65         , harvid_path ("")
  66         , harvid_reset (_("Reload docroot"))
  67         , harvid_list (ListStore::create(harvid_list_columns))
  68         , harvid_list_view (harvid_list)
  69         , show_advanced(false)
  70         , loaded_docroot(false)
  71 {
  72         set_session (s);
  73         set_name ("AddVideoDialog");
  74         set_modal (true);
  75         set_skip_taskbar_hint (true);
  76         set_resizable (true);
  77         set_size_request (800, -1);
  78
  79         harvid_initialized = false;
  80         std::string dstdir = video_dest_dir(_session->session_directory().video_path(), video_get_docroot(Config));
  81
  82         /* Harvid Browser */
  83         harvid_list_view.append_column("", pixBufRenderer);
  84         harvid_list_view.append_column(_("Filename"), harvid_list_columns.filename);
  85
  86         harvid_list_view.get_column(0)->set_alignment(0.5);
  87         harvid_list_view.get_column(0)->add_attribute(pixBufRenderer, "stock-id", harvid_list_columns.id);
  88         harvid_list_view.get_column(1)->set_expand(true);
  89         harvid_list_view.get_column(1)->set_sort_column(harvid_list_columns.filename);
  90         harvid_list_view.set_enable_search(true);
  91         harvid_list_view.set_search_column(1);
  92
  93         harvid_list_view.get_selection()->set_mode (SELECTION_SINGLE);
  94
  95         harvid_list_view.get_selection()->signal_changed().connect(sigc::mem_fun(*this, &AddVideoDialog::harvid_list_view_selected));
  96         harvid_list_view.signal_row_activated().connect (sigc::mem_fun (*this, &AddVideoDialog::harvid_list_view_activated));
  97
  98         Gtk::ScrolledWindow *scroll = manage(new ScrolledWindow);
  99         scroll->add(harvid_list_view);
 100         scroll->set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
 101
 102         HBox* hbox = manage (new HBox);
 103         harvid_path.set_alignment (0, 0.5);
 104         hbox->pack_start (harvid_path, true, true);
 105         hbox->pack_start (harvid_reset, false, false);
 106
 107         server_index_box.pack_start (*hbox, false, false);
 108         server_index_box.pack_start (*scroll, true, true);
 109
 110         /* file chooser */
 111         chooser.set_border_width (4);
 112 #ifdef __APPLE__
 113         /* some broken redraw behaviour - this is a bandaid */
 114         chooser.signal_selection_changed().connect (mem_fun (chooser, &Widget::queue_draw));
 115 #endif
 116         chooser.set_current_folder (dstdir);
 117
 118         Gtk::FileFilter video_filter;
 119         Gtk::FileFilter matchall_filter;
 120         video_filter.add_custom (FILE_FILTER_FILENAME, mem_fun(*this, &AddVideoDialog::on_video_filter));
 121         video_filter.set_name (_("Video files"));
 122
 123         matchall_filter.add_pattern ("*.*");
 124         matchall_filter.set_name (_("All files"));
 125
 126         chooser.add_filter (video_filter);
 127         chooser.add_filter (matchall_filter);
 128         chooser.set_select_multiple (false);
 129
 130         file_chooser_box.pack_start (chooser, true, true, 0);
 131
 132         /* Global Options*/
 133         Gtk::Label* l;
 134         VBox* options_box = manage (new VBox);
 135
 136         l = manage (new Label (_("<b>Options</b>"), Gtk::ALIGN_LEFT, Gtk::ALIGN_CENTER, false));
 137         l->set_use_markup ();
 138
 139         options_box->pack_start (*l, false, true, 4);
 140         options_box->pack_start (xjadeo_checkbox, false, true, 2);
 141         options_box->pack_start (set_session_fps_checkbox, false, true, 2);
 142
 143         /* preview pane */
 144         VBox* previewpane = manage (new VBox);
 145         Gtk::Table *table = manage(new Table(5,2));
 146
 147         table->set_row_spacings(2);
 148         table->set_col_spacings(4);
 149
 150         l = manage (new Label (_("<b>Video Information</b>"), Gtk::ALIGN_CENTER, Gtk::ALIGN_CENTER, false));
 151         l->set_use_markup ();
 152         table->attach (*l, 0, 2, 0, 1, FILL, FILL);
 153         l = manage (new Label (_("Start:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 154         table->attach (*l, 0, 1, 1, 2, FILL, FILL);
 155         table->attach (pi_tcin, 1, 2, 1, 2, FILL, FILL);
 156         l = manage (new Label (_("End:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 157         table->attach (*l, 0, 1, 2, 3, FILL, FILL);
 158         table->attach (pi_tcout, 1, 2, 2, 3, FILL, FILL);
 159         l = manage (new Label (_("Frame rate:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 160         table->attach (*l, 0, 1, 3, 4, FILL, FILL);
 161         table->attach (pi_fps, 1, 2, 3, 4, FILL, FILL);
 162         l = manage (new Label (_("Aspect Ratio:"), Gtk::ALIGN_RIGHT, Gtk::ALIGN_CENTER, false));
 163         table->attach (*l, 0, 1, 4, 5, FILL, FILL);
 164         table->attach (pi_aspect, 1, 2, 4, 5, FILL, FILL);
 165
 166         preview_image = manage(new Gtk::Image);
 167
 168         imgbuf = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, PREVIEW_WIDTH, PREVIEW_HEIGHT);
 169         imgbuf->fill(RGBA_TO_UINT(127,0,0,255));
 170         preview_image->set(imgbuf);
 171         seek_slider.set_draw_value(false);
 172
 173         hbox = manage (new HBox);
 174         hbox->pack_start (*table, true, false);
 175
 176         Gtk::Alignment *al = manage(new Gtk::Alignment());
 177         al->set_size_request(-1, 20);
 178
 179         previewpane->pack_start (*preview_image, false, false);
 180         previewpane->pack_start (seek_slider, false, false);
 181         previewpane->pack_start (*al, false, false);
 182         previewpane->pack_start (*hbox, true, true, 6);
 183
 184         /* Prepare Overall layout */
 185
 186         hbox = manage (new HBox);
 187         hbox->pack_start (browser_container, true, true);
 188         hbox->pack_start (*previewpane, false, false);
 189
 190         get_vbox()->set_spacing (4);
 191         get_vbox()->pack_start (*hbox, true, true);
 192         get_vbox()->pack_start (*options_box, false, false);
 193
 194         /* xjadeo checkbox */
 195         if (ARDOUR_UI::instance()->video_timeline->found_xjadeo()
 196                         /* TODO xjadeo setup w/ xjremote */
 197                         && video_get_docroot(Config).size() > 0) {
 198                 xjadeo_checkbox.set_active(true);  /* set in ardour_ui.cpp ?! */
 199         } else {
 200                 printf("xjadeo was not found or video-server docroot is unset (remote video-server)\n");
 201                 xjadeo_checkbox.set_active(false);
 202                 xjadeo_checkbox.set_sensitive(false);
 203         }
 204
 205         /* FPS checkbox */
 206         set_session_fps_checkbox.set_active(true);
 207
 208         /* Buttons */
 209         add_button (Stock::CANCEL, RESPONSE_CANCEL);
 210         ok_button = add_button (Stock::OK, RESPONSE_ACCEPT);
 211         //ok_button->set_sensitive(false);
 212         set_action_ok(false);
 213
 214         /* connect signals after eveything has been initialized */
 215         chooser.signal_selection_changed().connect (mem_fun (*this, &AddVideoDialog::file_selection_changed));
 216         chooser.signal_file_activated().connect (mem_fun (*this, &AddVideoDialog::file_activated));
 217         //chooser.signal_update_preview().connect(sigc::mem_fun(*this, &AddVideoDialog::update_preview));
 218         notebook.signal_switch_page().connect (sigc::hide_return (sigc::hide (sigc::hide (sigc::mem_fun (*this, &AddVideoDialog::page_switch)))));
 219         seek_slider.signal_value_changed().connect(sigc::mem_fun(*this, &AddVideoDialog::seek_preview));
 220         harvid_reset.signal_clicked().connect (sigc::mem_fun (*this, &AddVideoDialog::harvid_load_docroot));
 221 }
 222
 223 AddVideoDialog::~AddVideoDialog ()
 224 {
 225 }
 226
 227 void
 228 AddVideoDialog::on_show ()
 229 {
 230         /* overall layout depending on get_video_advanced_setup() and docroot */
 231         for (int i = notebook.get_n_pages(); i > 0 ; --i) {
 232                 notebook.remove_page(i);
 233         }
 234         if (server_index_box.get_parent()) {
 235                 server_index_box.get_parent()->remove(server_index_box);
 236         }
 237         if (file_chooser_box.get_parent()) {
 238                 file_chooser_box.get_parent()->remove(file_chooser_box);
 239         }
 240         if (notebook.get_parent()) {
 241                 notebook.get_parent()->remove(notebook);
 242         }
 243
 244         if (Config->get_video_advanced_setup()) {
 245                 notebook.append_page (server_index_box, _("VideoServerIndex"));
 246                 if (video_get_docroot(Config).size() > 0) {
 247                         notebook.append_page (file_chooser_box, _("Browse Files"));
 248                 }
 249                 browser_container.pack_start (notebook, true, true);
 250                 show_advanced = true;
 251                 if (!loaded_docroot) {
 252                         harvid_load_docroot();
 253                 }
 254         } else {
 255                 browser_container.pack_start (file_chooser_box, true, true);
 256                 show_advanced = false;
 257                 loaded_docroot = false;
 258         }
 259
 260         show_all_children ();
 261
 262         Dialog::on_show ();
 263 }
 264
 265 static bool check_video_file_extension(std::string file)
 266 {
 267         const char* suffixes[] = {
 268                 ".avi"     , ".AVI"     ,
 269                 ".mov"     , ".MOV"     ,
 270                 ".ogg"     , ".OGG"     ,
 271                 ".ogv"     , ".OGV"     ,
 272                 ".mpg"     , ".MPG"     ,
 273                 ".mpeg"    , ".MPEG"    ,
 274                 ".mts"     , ".MTS"     ,
 275                 ".m2t"     , ".M2T"     ,
 276                 ".mov"     , ".MOV"     ,
 277                 ".mp4"     , ".MP4"     ,
 278                 ".mkv"     , ".MKV"     ,
 279                 ".vob"     , ".VOB"     ,
 280                 ".asf"     , ".ASF"     ,
 281                 ".avs"     , ".AVS"     ,
 282                 ".dts"     , ".DTS"     ,
 283                 ".flv"     , ".FLV"     ,
 284                 ".m4v"     , ".M4V"     ,
 285                 ".matroska", ".MATROSKA",
 286                 ".h264"    , ".H264"    ,
 287                 ".dv"      , ".DV"      ,
 288                 ".dirac"   , ".DIRAC"   ,
 289                 ".webm"    , ".WEBM"    ,
 290                 ".wmv"     , ".WMV"     ,
 291                 ".ts"      , ".TS"      ,
 292                 ".mxf"     , ".MXF"     ,
 293         };
 294
 295         for (size_t n = 0; n < sizeof(suffixes)/sizeof(suffixes[0]); ++n) {
 296                 if (file.rfind (suffixes[n]) == file.length() - strlen (suffixes[n])) {
 297                         return true;
 298                 }
 299         }
 300
 301         return false;
 302 }
 303
 304 bool
 305 AddVideoDialog::on_video_filter (const FileFilter::Info& filter_info)
 306 {
 307         return check_video_file_extension(filter_info.filename);
 308 }
 309
 310 std::string
 311 AddVideoDialog::file_name (bool &local_file)
 312 {
 313         int n = notebook.get_current_page ();
 314         if (n == 1 || !show_advanced) {
 315                 local_file = true;
 316                 return chooser.get_filename();
 317         } else {
 318                 local_file = false;
 319                 Gtk::TreeModel::iterator iter = harvid_list_view.get_selection()->get_selected();
 320                 if(!iter) return "";
 321
 322                 std::string uri = (*iter)[harvid_list_columns.uri];
 323                 std::string video_server_url = video_get_server_url(Config);
 324
 325                 /* check if video server is running locally */
 326                 if (video_get_docroot(Config).size() > 0 &&
 327                         (0 == video_server_url.compare (0, 16, "http://127.0.0.1") || 0 == video_server_url.compare (0, 16, "http://localhost"))
 328                    )
 329                 {
 330                         /* check if the file can be accessed */
 331                         int plen;
 332                         CURL *curl;
 333                         curl = curl_easy_init();
 334                         char *ue = curl_easy_unescape(curl, uri.c_str(), uri.length(), &plen);
 335 #ifdef PLATFORM_WINDOWS
 336                         char *tmp;
 337                         while ((tmp = strchr(ue, '/'))) *tmp = '\\';
 338 #endif
 339                         std::string path = video_get_docroot(Config) + ue;
 340                         if (!::access(path.c_str(), R_OK)) {
 341                                 uri = path;
 342                                 local_file = true;
 343                         }
 344                         curl_easy_cleanup(curl);
 345                         curl_free(ue);
 346                 }
 347                 return uri;
 348         }
 349 }
 350
 351 enum VtlImportOption
 352 AddVideoDialog::import_option ()
 353 {
 354         int n = notebook.get_current_page ();
 355         if (n == 0 && show_advanced) { return VTL_IMPORT_NONE; }
 356         return VTL_IMPORT_TRANSCODE;
 357 }
 358
 359 bool
 360 AddVideoDialog::launch_xjadeo ()
 361 {
 362         return xjadeo_checkbox.get_active();
 363 }
 364
 365 bool
 366 AddVideoDialog::auto_set_session_fps ()
 367 {
 368         return set_session_fps_checkbox.get_active();
 369 }
 370
 371 void
 372 AddVideoDialog::clear_preview_image ()
 373 {
 374         imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 375         video_draw_cross(imgbuf);
 376         preview_image->set(imgbuf);
 377         preview_image->show();
 378 }
 379
 380 void
 381 AddVideoDialog::set_action_ok (bool yn)
 382 {
 383         if (yn) {
 384                 ok_button->set_sensitive(true);
 385         } else {
 386                 preview_path = "";
 387                 pi_tcin.set_text("-");
 388                 pi_tcout.set_text("-");
 389                 pi_aspect.set_text("-");
 390                 pi_fps.set_text("-");
 391                 ok_button->set_sensitive(false);
 392                 clear_preview_image();
 393         }
 394 }
 395
 396 void
 397 AddVideoDialog::file_selection_changed ()
 398 {
 399         if (chooser.get_filename().size() > 0) {
 400                 std::string path = chooser.get_filename();
 401                 bool ok =
 402                                 Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_REGULAR | Glib::FILE_TEST_IS_SYMLINK)
 403                                 && !Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_DIR);
 404                 set_action_ok(ok);
 405                 if (ok) {
 406                         seek_slider.set_value(0);
 407                         request_preview(video_map_path(video_get_docroot(Config), path));
 408                 }
 409         } else {
 410                 set_action_ok(false);
 411         }
 412 }
 413
 414 void
 415 AddVideoDialog::file_activated ()
 416 {
 417         if (chooser.get_filename().size() > 0) {
 418                 std::string path = chooser.get_filename();
 419                 // TODO check docroot -> set import options
 420                 bool ok =
 421                                 Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_REGULAR | Glib::FILE_TEST_IS_SYMLINK)
 422                                 && !Glib::file_test(path.c_str(), Glib::FILE_TEST_IS_DIR);
 423                 if (ok) {
 424                         Gtk::Dialog::response(RESPONSE_ACCEPT);
 425                 }
 426         }
 427 }
 428
 429 /**** Tree List Interaction ***/
 430
 431 void
 432 AddVideoDialog::harvid_list_view_selected () {
 433         Gtk::TreeModel::iterator iter = harvid_list_view.get_selection()->get_selected();
 434         // TODO check docroot -> set import options, xjadeo
 435         if(!iter) {
 436                 set_action_ok(false);
 437                 return;
 438         }
 439         if ((std::string)((*iter)[harvid_list_columns.id]) == Stock::DIRECTORY.id) {
 440                 set_action_ok(false);
 441         } else {
 442                 set_action_ok(true);
 443                 seek_slider.set_value(0);
 444                 request_preview((*iter)[harvid_list_columns.uri]);
 445         }
 446 }
 447
 448 void
 449 AddVideoDialog::harvid_list_view_activated (const Gtk::TreeModel::Path& path, Gtk::TreeViewColumn*) {
 450         Gtk::TreeModel::iterator iter = harvid_list->get_iter(path);
 451         if (!iter) return;
 452         std::string type = (*iter)[harvid_list_columns.id];
 453         std::string url = (*iter)[harvid_list_columns.uri];
 454
 455 #if 0
 456         printf ("A: %s %s %s\n",
 457                         ((std::string)((*iter)[harvid_list_columns.id])).c_str(),
 458                         ((std::string)((*iter)[harvid_list_columns.uri])).c_str(),
 459                         ((std::string)((*iter)[harvid_list_columns.filename])).c_str());
 460 #endif
 461
 462         if (type == Gtk::Stock::DIRECTORY.id) {
 463                 harvid_request(url.c_str());
 464         } else {
 465                 Gtk::Dialog::response(RESPONSE_ACCEPT);
 466         }
 467 }
 468
 469 void
 470 AddVideoDialog::harvid_load_docroot() {
 471         set_action_ok(false);
 472         loaded_docroot = true;
 473
 474         std::string video_server_url = video_get_server_url(Config);
 475         char url[2048];
 476         snprintf(url, sizeof(url), "%s%sindex/"
 477                 , video_server_url.c_str()
 478                 , (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/");
 479         harvid_request(url);
 480         harvid_initialized = true;
 481 }
 482
 483 bool
 484 AddVideoDialog::page_switch() {
 485         if (notebook.get_current_page () == 1 || show_advanced) {
 486                 file_selection_changed();
 487                 return true;
 488         }
 489
 490         if (harvid_initialized) {
 491                 harvid_list_view_selected();
 492         } else {
 493                 harvid_load_docroot();
 494         }
 495         return true;
 496 }
 497
 498 /**** Harvid HTTP interface ***/
 499 void
 500 AddVideoDialog::harvid_request(std::string u)
 501 {
 502         char url[2048];
 503         int status;
 504         snprintf(url, sizeof(url), "%s?format=csv", u.c_str());
 505
 506         harvid_list->clear();
 507
 508         char* res = ArdourCurl::http_get (url, &status);
 509         if (status != 200) {
 510                 printf("request failed\n"); // XXX
 511                 harvid_path.set_text(" - request failed -");
 512                 free(res);
 513                 return;
 514         }
 515
 516         /* add up-to-parent */
 517         size_t se = u.find_last_of("/", u.size()-2);
 518         size_t ss = u.find("/index/");
 519         if (se != string::npos && ss != string::npos && se > ss) {
 520                 TreeModel::iterator new_row = harvid_list->append();
 521                 TreeModel::Row row = *new_row;
 522                 row[harvid_list_columns.id      ] = Gtk::Stock::DIRECTORY.id;
 523                 row[harvid_list_columns.uri     ] = u.substr(0, se + 1);
 524                 row[harvid_list_columns.filename] = X_("..");
 525         }
 526         if (se != string::npos) {
 527                 int plen;
 528                 std::string path = u.substr(ss + 6);
 529                 CURL *curl;
 530                 curl = curl_easy_init();
 531                 char *ue = curl_easy_unescape(curl, path.c_str(), path.length(), &plen);
 532                 harvid_path.set_text(std::string(ue));
 533                 curl_easy_cleanup(curl);
 534                 curl_free(ue);
 535         } else {
 536                 harvid_path.set_text(" ??? ");
 537         }
 538
 539         if (!res) return;
 540
 541         std::vector<std::vector<std::string> > lines;
 542         ParseCSV(std::string(res), lines);
 543         for (std::vector<std::vector<std::string> >::iterator i = lines.begin(); i != lines.end(); ++i) {
 544                 TreeModel::iterator new_row = harvid_list->append();
 545                 TreeModel::Row row = *new_row;
 546
 547                 if (i->at(0) == X_("D")) {
 548                         row[harvid_list_columns.id      ] = Gtk::Stock::DIRECTORY.id;
 549                         row[harvid_list_columns.uri     ] = i->at(1).c_str();
 550                         row[harvid_list_columns.filename] = i->at(2).c_str();
 551                 } else {
 552                         row[harvid_list_columns.id      ] = Gtk::Stock::MEDIA_PLAY.id;
 553                         row[harvid_list_columns.uri     ] = i->at(2).c_str();
 554                         row[harvid_list_columns.filename] = i->at(3).c_str();
 555                 }
 556         }
 557
 558         free(res);
 559 }
 560
 561 void
 562 AddVideoDialog::seek_preview()
 563 {
 564         if (preview_path.size() > 0)
 565                 request_preview(preview_path);
 566 }
 567
 568 void
 569 AddVideoDialog::request_preview(std::string u)
 570 {
 571         std::string video_server_url = video_get_server_url(Config);
 572
 573         double video_file_fps;
 574         long long int video_duration;
 575         double video_start_offset;
 576         double video_aspect_ratio;
 577
 578         int clip_width = PREVIEW_WIDTH;
 579         int clip_height = PREVIEW_HEIGHT;
 580         int clip_xoff, clip_yoff;
 581
 582         if (!video_query_info(video_server_url, u,
 583                         video_file_fps, video_duration, video_start_offset, video_aspect_ratio))
 584         {
 585                 printf("image preview info request failed\n");
 586                 // set_action_ok(false); // XXX only if docroot mismatch
 587                 preview_path = "";
 588                 pi_tcin.set_text("-");
 589                 pi_tcout.set_text("-");
 590                 pi_aspect.set_text("-");
 591                 pi_fps.set_text("-");
 592
 593                 clear_preview_image();
 594                 return;
 595         }
 596
 597         if ((PREVIEW_WIDTH / (double)PREVIEW_HEIGHT) > video_aspect_ratio ) {
 598                 clip_width = MIN(PREVIEW_WIDTH, rint(clip_height * video_aspect_ratio));
 599         } else {
 600                 clip_height = MIN(PREVIEW_HEIGHT, rint(clip_width / video_aspect_ratio));
 601         }
 602
 603         pi_tcin.set_text(Timecode::timecode_format_sampletime(
 604                                 video_start_offset, video_file_fps, video_file_fps, rint(video_file_fps*100.0)==2997));
 605         pi_tcout.set_text(Timecode::timecode_format_sampletime(
 606                                 video_start_offset + video_duration, video_file_fps, video_file_fps, rint(video_file_fps*100.0)==2997));
 607
 608         /* todo break out this code -> re-usability */
 609         const int arc = rint(video_aspect_ratio*100);
 610
 611         switch (arc) {
 612                 case 100:
 613                         pi_aspect.set_text(X_(" 1:1"));  // square (large format stills)
 614                         break;
 615                 case 125:
 616                         pi_aspect.set_text(X_(" 5:4"));
 617                         break;
 618                 case 133:
 619                         pi_aspect.set_text(X_(" 4:3"));
 620                         break;
 621                 case 134:
 622                         pi_aspect.set_text(X_(" 47:35")); // 752x560, Super8-scans
 623                         break;
 624                 case 137:
 625                 case 138:
 626                         pi_aspect.set_text(X_(" 1.37:1")); // 'Academy ratio' <= 1953
 627                         break;
 628                 case 141:
 629                         pi_aspect.set_text(X_(" 1.41:1")); //  Lichtenberg ratio
 630                         break;
 631                 case 150:
 632                         pi_aspect.set_text(X_(" 3:2"));  // classic 35mm
 633                         break;
 634                 case 160:
 635                         pi_aspect.set_text(X_(" 8:5"));  // credit-card size
 636                         break;
 637                 case 162:
 638                         pi_aspect.set_text(X_(" 16:10")); // golden ratio 1.61803..
 639                         break;
 640                 case 166:
 641                 case 167:
 642                         pi_aspect.set_text(X_(" 5:3")); // Super16, EU-widescreen
 643                         break;
 644                 case 177:
 645                 case 178:
 646                         pi_aspect.set_text(X_(" 16:9")); // HD video
 647                         break;
 648                 case 180:
 649                         pi_aspect.set_text(X_(" 9:5"));
 650                         break;
 651                 case 185:
 652                         pi_aspect.set_text(X_(" 1.85:1")); // US widescreen cinema
 653                         break;
 654                 case 200:
 655                         pi_aspect.set_text(X_(" 2:1"));
 656                         break;
 657                 case 239:
 658                 case 240:
 659                         pi_aspect.set_text(X_(" 2.40:1")); // Anamorphic
 660                         break;
 661                 case 266:
 662                 case 267:
 663                         pi_aspect.set_text(X_(" 2.66:1")); // CinemaScope
 664                         break;
 665                 case 275:
 666                         pi_aspect.set_text(X_(" 2.75:1")); // Ultra Panavision
 667                         break;
 668                 case 400:
 669                         pi_aspect.set_text(X_(" 4.00:1")); // three 35mm 1.33:1 polyvision
 670                         break;
 671                 default:
 672                         pi_aspect.set_text(string_compose(X_(" %1:1"), video_aspect_ratio));
 673                 break;
 674         }
 675
 676         pi_fps.set_text(string_compose(_(" %1 fps"), video_file_fps));
 677
 678         clip_xoff = (PREVIEW_WIDTH - clip_width)/2;
 679         clip_yoff = (PREVIEW_HEIGHT - clip_height)/2;
 680
 681         char url[2048];
 682         snprintf(url, sizeof(url), "%s%s?frame=%lli&w=%d&h=%di&file=%s&format=rgb"
 683                 , video_server_url.c_str()
 684                 , (video_server_url.length()>0 && video_server_url.at(video_server_url.length()-1) == '/')?"":"/"
 685                 , (long long) (video_duration * seek_slider.get_value() / 1000.0)
 686                 , clip_width, clip_height, u.c_str());
 687
 688         char* data = ArdourCurl::http_get (url, NULL);
 689         if (!data) {
 690                 printf("image preview request failed %s\n", url);
 691                 imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 692                 video_draw_cross(imgbuf);
 693                 preview_path = "";
 694         } else {
 695                 Glib::RefPtr<Gdk::Pixbuf> tmp;
 696                 tmp = Gdk::Pixbuf::create_from_data ((guint8*) data, Gdk::COLORSPACE_RGB, false, 8, clip_width, clip_height, clip_width*3);
 697                 if (clip_width != PREVIEW_WIDTH || clip_height != PREVIEW_HEIGHT) {
 698                         imgbuf->fill(RGBA_TO_UINT(0,0,0,255));
 699                 }
 700                 tmp->copy_area (0, 0, clip_width, clip_height, imgbuf, clip_xoff, clip_yoff);
 701                 preview_path = u;
 702                 free(data);
 703         }
 704         preview_image->set(imgbuf);
 705         preview_image->show();
 706 }